        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            background-color: #f0f2f5;
            margin: 0;
            color: #333;
        }
        .container {
            background-color: #fff;
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
            width: 100%;
            max-width: 600px;
            box-sizing: border-box;
            text-align: center;
        }
        h1 {
            color: #007bff;
            margin-bottom: 25px;
            font-size: 2em;
        }
        .input-area {
            display: flex;
            margin-bottom: 20px;
            gap: 10px;
        }
        input[type="text"] {
            flex-grow: 1;
            padding: 12px 15px;
            border: 1px solid #ced4da;
            border-radius: 8px;
            font-size: 1em;
            outline: none;
            transition: border-color 0.3s;
        }
        input[type="text"]:focus {
            border-color: #007bff;
            box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
        }
        button {
            padding: 12px 25px;
            background-color: #007bff;
            color: white;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-size: 1em;
            transition: background-color 0.3s ease, transform 0.1s ease;
            box-shadow: 0 4px 10px rgba(0, 123, 255, 0.2);
        }
        button:hover {
            background-color: #0056b3;
            transform: translateY(-1px);
        }
        button:active {
            transform: translateY(0);
            box-shadow: 0 2px 5px rgba(0, 123, 255, 0.3);
        }
        .response-area {
            background-color: #e9ecef;
            padding: 20px;
            border-radius: 8px;
            text-align: left;
            min-height: 100px;
            max-height: 400px;
            overflow-y: auto;
            border: 1px solid #dee2e6;
            white-space: pre-wrap; /* 保留空白符和换行 */
            word-wrap: break-word; /* 自动换行 */
        }
        .response-area p {
            margin: 0;
            line-height: 1.6;
            color: #495057;
        }
        .loading-indicator {
            margin-top: 15px;
            font-style: italic;
            color: #6c757d;
        }